Timer extension



Oct. 2 1923. 1,469,440

L. w. LOCKWOOD TIMER EXTENS ION Filed Dec. 21 1920 :15 1 3 4 I Ituerzi'r A l wzoci'lwoad Patented Oct. 2, 1923.

FUNITED STATES LE]: w. LOCKWOOD, or MINNEAPOLIS, MINNESOTA.

TIMER EXTENSION.

Application flled December 21, 1920. Serial in. #132,276.

Too 107mm itmoy concern.

Be it known that I, Lnn W. LooKwooD, a. citizen of the'l nited States, residing in Hinnt-apolis. in thecounty of Ileunepin and State of Minnesota, have invented a new and useful Timmlfixtension, of which the following is a specification.

y invention relates toimprovements in timer extensions. V

Its objectis to provide a device of this nature fornse in connection with timers for internal combustion engines, whereby the usually exposed, swinging, conducting wires to the timer may be eliminated, thus avoiding frequent disconnections and short circuits, due to the movements and fouling of said freely swinging and unprotected wires. More specifically, it is my object to provide an extension attachment carrying a plurality of fixed conductors, adapted to be brushed by yielding contact elements, readilyapplicable to the terminals'of a timer.

With the foregoing and other objects in View, which will appear the following de scription, the invention resides in the novel combination and arrangement of parts and in the details of construction hereinafter described and claimed.

In the drawings, Fig. 1 is an elevation of myimproved device, shown in connection with a timer and the front cover plate of an engine; Fig. 2 is a plan view of the same, shown in connection with a timer; Fig. 3 is an enlarged sectional view in detail taken on the line 3-3 of Fig. 1; Fig. 4 is an enlarged, central, longitudinal, sectional view of one of my yielding contact members; Fig. 5 is an enlarged sectional view in detailtaken on the line 5-5 of F ig. 1 and illustrates the manner in which the fixed contact plates are applied to my extension member, and Fig. 6 is a plan view of a blank comprising one of my contact plates.

Referring to the drawings, it will be seen that my improved device comprises an extension member A. formed with a ring 10 at one end thereof and an elongated tcimi nal attaching portion 11 atits other end. This extension member is made up of a plurality of superimposed blanks of suitable insulating material, preferably three in number. end to end, as shown in Fig. 1, a space be ing provided between each plate to form which Contact plates 12 are mounted,

a broken band, concentric with the center of the ring, 10. The ends of each contact plate are reduced. in width to formclips 13, are turned inward and passed through slots 14; in the layers of thef ring 10. These clips seat and lock the contact plates firmly upon said-ring. The clips 13 on two of the contact plates 12 are, turned between the firstjand second layersof the extension member, while the clips on the remaining plates are turned between the secthe neck of the extension member A to receive bolts 19, employed in clamping the cover plate 20 ofthe engine inplace, In applying the extension member, the timer 21 of an engineis first removed by lifting the usual timer case spring 22. The bolts 19 are removed from the cover plate, inserted in the openings 18 in the extension mem her A and replaced, thus rigidly holding said extension member in position shown in Fig. 1.

I supply a yielding contact member B for each terminal of a timer, Each member comprises a block 23 having a threaded bore 24 passing transversely therethrough and adapted to be turned upon a terminal post 25, ordinarily employed for receiving nuts, between which a wire terminal is clamped. The block 23, in each yielding contact member, is formed with bores or slides 26 near the ends thereof upon opposite sides and at right angles to the threaded bore 24. A U shaped shoe C, hav-' ing the tips of its legs 0 turned inward to form seats 27, is applied to the block, as

shown in Fig. 4, the seats 27 being placed within the slides 26, in which compression springs 28 have been previously placed. Subsequently to assembling a block, shoe and springs, the inner margins of the slides 27 are flared inwardly, as by means of a punch or chisel, to narrow the mouths of the slides and form stops 29. These stops limit the action of the springs 28 and bar threaded on each terminal post 25 of a timer, a resilient locking washer interposed between each block and the timer casing. Said blocks are turned inward to position wherein they are rigidly held in engagement with their resilient locking washers lock nuts 3t being thereafter applied to the terminal posts to firmly secure said blocks 23 against accidental turning movements upon said posts. Having applied my yielding contact members to the terminal posts ot a timer, as above described, the timer 21 is replaced in original position and secured by means oi the usual spring 2. In such pos ion of the timer, the has it (1 of the yield'ug shoes '1 brush against the contact plates 3" z on the extension member. Oscillation oi the timer, in the usual manner, operates to advance and retard the spark, as usual. l t will be noted thatmy yielding contact shoes, in place upon a timer, require relatively light compression springs 28 to secure proper contact with the contact plates 12, also that the pressure against each blocl: 23 is divided upon opposite sides of its terminal post, thus avoiding any tendency to turn the block and impair the connection between the terminal post and its respective contact plate 12 on the extension member. It will be further noted that the clips 13. on the ends of the contact plates 12, serve not only as means for securing the plates upon the ring 10 of the extension member A, but also furnish desirable means for connection with the wires imbedded inthe extension structure.

Changes in the specific form of my invention, as herein disclosed, may be made within the scope of what is claimed without departing vfrom the spirit of my invention.

mesa to Having described my invention, what I 30 being claim as new and desire to secure by Letters Patent is:

1. In a device of the class described, an extension member, contact plates on said member, binding posts, on said member, removed from said contact plates and respectively connected therewith, and yielding contact members adapted to be readily applied to the terminal posts of an ordinary timer and adapted to brush said. contact plates.

2. The combination with an engine equipped with an oscillating timer, of an extension member adapted to be secured to the engin and carrying lixed contact plates and bind posts removed from said plates, each oi said plates being electrically connected with one oi. said posts. contact nlembcrs adapted to be applied to the terminal posts of the timer, each member comprising a block having 'a bore therein to receive a timer binding post and a contact shoe yieldingly carried on said block.

The combination with an engine having an oscillating timer, of an extension member adapted to be secured to the engine, stationary contact plates on said member, yielding contact elements for attachment to the terminal posts of the timer, each element comprising a block adapted to be threaded on a timer terminal post, said block being tormed with slides upon opposite sides of said threaded bore and at right an gles with respect thereto. a U shaped shoe, the ends thereof being slid-able within said slides, springs operating to yieldingly force the shoe outward from said block and stops to limit such movement of said shoe.

In testimony whereof, I have signed my name to this specification.

LEE W. LOCKWOOD. 

